Method of bilging a cylindrical body of sheet metal



C. H. REGEL METHOD OF BILGING A CYLINDRICAL ODY OF SHEET METAL I May 13 1924.

Filed AHH. 5.

A1921 2 sheets-sneer x May 13, 1924.

. c. H. RIEGEL.

METHOD OF BILGING A CYLINDRICAL BODY OF SHEET METAL Y 2 Sheets-Sheet 2 Filed Aug. 5, 1921 gri/73111501 33h11 CLARENCE HPIEGEL Gwenn,

Patented May 173, 19724.

` UNTED y ciinnnNcE n. einem; or Nimes, onr'of'."

METHOD or BIILGI'NG Angc'sriiivnnrcannon or siannriuE`1uiI,. iV

-application filed August 5, 1921'. sen'ai` mi; 490,1? 5a` To all whom tV may concern) Be it known that I; CLARENCE H.=RIEGEL,

a citizen of the United Sta-tes, residing-at 434 RobbinsAve., Niles, in thefcounty of Trumbull, State.' of 0hio,'vhave vinvented certain new and useful Improvements in Methods of vBilging '-a.. Cylindrical Body :of

Sheet Metal, of'whichthe.'followingf-is a specification. A

This invention relates-to the art o,l1 nak ing-metal casks or barrels, fand consists of an improved method of bilging cylindrical bodies or' sheet metal "and co -pincidently forming an annular channel and bead in the bilged area. Thus the steps taken are intended to bilge the' body',y and also to strengthen thebody-'against lateral pres'- sures at itslargest diameter where the wall is reducedinthickness by. bilging, and to produce a spring fold inthe materialfitseli adapted to absorb such-shocks asfresult indropping the barrel body on either of its chimes o rends.V` f 'A In the annexed'drawings, Fig. 1 isa diagrammatic view of a set of expanding dies and Fig. 2 vis a vertical section'oi1 a machine embodying such dies, each g'ure ,showing a straight cylinder sleeved overthe-.dies` pre'-'v paratory to bilging operations. Figs y and'l e1 are corresponding views to' Figs. l and 2,'-

showingthe dies expanded a'nd'ione-haltl of the cylinder bilged.` Fig."5`is a diagrammatic view showing the partly bilged cylin'- der sleeved in an inverted position overthe f collapsed dies, and Fig. 6 isa view corre" sponding tov Fig. 5 excepting ythatthe dies are expanded and Jche cylinder is'sho-wn as bilged at each sideof an annular channel and beady formed in the middle oit the cylinder. Fig. 7 is an enlarged section and side elevation of the product of the method involved herein. I

To illustrate the steps taken in producing a bilged barrel I showin Figs. 2 and machine or apparatus in which a .series oi" segmental dies 5 are placed inl a circle radially opposite a reciprocable thrust rod 6 which is actuated by an eccentric or crank shaft T and an eccentric strap 8. A base plate 9 supports standards 10 in which shaft 7 has rotatable `bea-ring, and the dies 5 are secured to vertical members 11 which are supported to slide upon a table 12 resting upon the upper ends of standards 10. The die carrying members 11 are actuatedby toggle links 14 which connect with an adj ustable' are Spreadapafrt until 'the-links arey hori- Azontal. Fachdieis curvedftransversely 'oni a larger radius ythan f the radius ofjtfhecysleeve oricollar 1591ilreciprocable-rod-fand' when thel rod moves downwardly -the'ffdies f lindrical -shell whenit islirst sleeved over the dies', andthe longitudinal,curvature of'.

the diefisless 'thanl half` the "length of the cylinder or shellzto be Vop'eratedfupon `As shown each die tapers downwardly vfrom Aa f rounded l Shoulder' 16. located at or relatively near the-transverse media-n linef-oithecyl-k V inder 'when at rest 4opposite"theydies as I shown in Fig. `2, and the .rststepiiivolved in factually bilging the cylinder -occurs when th'edies-are forced outwardly: by` a one half` revolution of the eccentric "which draws f the thrust roddownwardlyuntilth'eoperate" ing parts arein theposi'tionishcwnih Figs.

3 and 4. Thus the irststep in bilging the cylinder consists in expanding `one end p0rtion thereof to `a larger dia-meteron taper'- 'ing linesl Vvlongitudinally while coincidently formingy an annular shoulder or' i'setl'?4 approximately ,midlength' ofthe cylinder. ,In so doing the 'metal"wall ofthe cylinder .isreduced in thickness gradually from they bottom `end-of they cylinder l`to lthe; annular shoulder or v'oiset :17 but thefbaseor botey tom of theoffset isnot appreciablyt decreased in thickness inasmuch as theg'uppr i y half andthe middle partor1 vthewcylinderl is not expanded in this operatioir'L The' upper half of the cylinderlzis ex"-V panded andbilged-in exactly thefsame'way as thelower half, which step follows as soon as the dies have' been collapsed' bythecon-` tinuing rotation offthe eccentric tothe place of beginning tof' 'permit the'` partially eX- panded cylinder to be removed from thedies and then inverted andv again sleeved over the dies to bring -the plain straight'portioni thereof opposite the taperedcurved portion of the dies as collapsed and shown indiagram inFig. 5. The eccentric is then rotated a! secondv timeto spreadt-he'. dies uni formly to their limit, thereby expanding and stretching the straight wall ofthe cylinder to the same bilge and ycontourias ythe endk first operated upon While producing at the same time asecond annular offset 17 which together with offset 17 `forms a round annular channel and internal beady 18 midway between the two bilged portions7 see Fig.

6. The bilged product is then removed from the dies as soon as the eccentric completes and as this be'ador belt portion. is not ma,-` terially expanded by the dies it remains substantially unaltered in thickness and strength andl provides ay substantial reenorcement for the bilgedfbody where otherwise` stretched to its greatest extent. The dies in moving outwardly engage the cylinder first near its middle and thenl'oncircular lines moving rtoward one end, and at the beginning only the meeting` corners ot the dies atvtheir largest diameter engage the circular wall of the cylinder. During the final stages of bilging each half of the cylinder, the dies'move outwardly at gradually decreasing speed and increasing power on account of the Leccentric and crank movement involvedv and because the links move.

on an arc toward a horizontal line which brings the-pivots of the links on a dead center. v

What I claim is:

l. A method of making a of sheet metal, consisting in expanding portions of the respective end halves of a sheet metal cylinder tosubstantially the same diameter by applying an outwardly-moving pressure uniformly at equi-'distant radial points, beginning iirst within one end half of the cylinder to completion and then separately within theopposite end half ofV said cylinder. n

2. Ainethod of making a; metal cask or barrel consisting in expanding and stretching an annular enlargement in one end portion ofva sheet metal cylinder by applying pressure internally at luniformly -spaced radial points within said end, and then repeating said step in theopposite end portion of said cylinder, and leaving an unexcask or barrelr panded portion intermediate said enlarge-` ments. 1

3. A method of making a cask or barrel of sheet metal, consisting-in expanding the opposite end halves of a cylindrical body to substantiallylthesame shape and diameter separately and successively by localizing the applicationof equal. pressure at equi-distant radial places internally of said cylinder,

lirst in one end of the cylinder and subsequently inthe opposite end.

4. A method of' making a caskor barrel,y

consisting in expanding a cylindrical sheetmetal body on reversely-tapering lines, be-` offset approximatelyk nearvthe middle there-` of, and repeating said operation in theother half ofthe body.

, 7. A method of bilging a cylindrical body of sheet metal, consisting in stretching the body to a larger diameter near its middle than at its ends in one end section of the body;'in repeating said step inthe opposite end section; and in forming an annular' channel and belt in vthe middle section 0l the body.

8. A method of bilging a cylindricalbodyA f ot' sheet metal, consisting in expanding onel end portion of the body toalarger diameter on tapering lines longitudinally, while coincidently formingan annular odset approximately midlength of the cylinder; and then repeating the same operation in the opposite end portion of lthe body.

CLARENCE H. RIEGEL. 

